Sheth and Cain are not the same person in The Bible. Cain is the firstborn son of Adam and Eve, known for committing the first murder by killing his brother Abel. Sheth (or Seth) is another son of Adam and Eve, born after Abel's death, and is considered a replacement for Abel. Sheth is significant in the genealogical line leading to Noah and, ultimately, to Jesus in the New Testament.
No it is not the same person.
No. Chronologically, Kayin (Cain) was earlier ... about as early as a person in the Bible could be. He was the son of Adam and Eve, a farmer, and the brother of Abel, who he killed. (Genesis 4:1-16) Tuval-Kayin (Tubal Cain) came 6 generations later, and was Cain's great-great-great-great-grandson. His parents were Lamech and Tzillah, and he sharpened cutting implements of copper and iron. (Genesis 4:19-22)
Oh, my friend, there is no chapter in the Bible that says Cain was black. The Bible does not mention anything about Cain's skin color. Remember, what truly matters is the love and kindness we show to one another, regardless of our differences. Keep spreading positivity and warmth like a happy little tree.
Grendel's ancestor was the biblical figure Cain, who was cursed by God for murdering his brother Abel. According to the legend in the epic poem Beowulf, Grendel is depicted as a descendant of Cain, marked by the same curse and doomed to roam the earth as a monster.
Only in the same way that McCain is related to Cain from the Bible. That is, there is a similarity of name.
Methuselah, Cain, and Noah did not live at the same time. According to the Bible, Methuselah was the son of Enoch and the grandfather of Noah, living for 969 years before the Flood. Cain, the son of Adam and Eve, lived long before Noah and Methuselah, making it unlikely that their lifetimes overlapped.
It's impossible to answer, except that, if you believe the Bible is true, Adam was the first person created, Eve was the second, Cain was their first child, so techincally, according to the Bible, Cain was the first person ever born.
Yes.
No. There is no indication that they are.
Genesis 4:5-7: "God did not turn towards Cain and his offering," meaning that He didn't show the same favor towards Cain's offering which He had bestowed upon Abel's offering. According to tradition, this is because Abel took pains to offer the best, while Cain was cavalier and offered whatever came to hand.
He is the same historical person, but with differring details.
No, Nathaniel and Bartholomew are not the same person in the Bible. Nathaniel is a disciple of Jesus mentioned in the Gospel of John, while Bartholomew is also a disciple of Jesus mentioned in the Gospels of Matthew, Mark, and Luke. Some scholars believe that Nathaniel and Bartholomew may be the same person, but this is not definitively confirmed in the Bible.